Stress relief features for an overmolded base
a technology of overmolded base and stress relief, which is applied in the direction of record information storage, electrical apparatus construction details, instruments, etc., can solve the problems of low material stiffness, low material stiffness, and the inability to manufacture disc drives of type i or type ii small form factor,
Active Publication Date: 2006-08-24
SEAGATE TECH LLC
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AI Technical Summary
Benefits of technology
"The present invention is about a base used in a data storage system. It has a metal section and an overmold section that helps reduce distortion stresses on the metal section. The overmold section has multiple stress relief features, including thin walls, which provide a thinner layer to help alleviate the stress. This invention helps create an airtight enclosure for data storage."
Problems solved by technology
One of the difficulties in meeting such small thicknesses is the formation of the base of the small form factor drive.
However, the manufacture of Type I or Type II small form factor disc drives using aluminum die-casting is not ideal for performance and cost reasons.
Example problems for an aluminum die cast small form factor base include low material stiffness and a lack of magnetic properties.
Other more detailed features of the base, such as mounting slots, a filter holder and actuator crash stops are difficult to make by the stamping process alone.
Attempting to make a small form factor base thinner results in more encounters with related problems.
For example, a common problem is base distortion.
Base distortion is distortion or deformation of the metallic section of the base that can likely cause performance problems or functional problems.
Low environmental temperatures cause the plastic section of the base to contract even more.
Method used
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[0022]FIG. 1 is a simplified top plan view of a disc drive storage system 100 that includes a base 102 in accordance with the present invention. A top cover (not shown) attaches to base 102 to form a hermetically seated disc drive enclosure. Disc drive 100 also includes a single assembly 104 that includes a spindle 106 that is rotated by a spindle motor (not shown). A disc or disc pack 108 is mounted to spindle 106 by a disc clamp 110. Disc pack 108 includes one or more individual discs 112, which are mounted for co-rotation about a central axis 114 of spindle 106. Spindle 106 fits through a hole (shown in FIGS. 2, 3 and 6). Each disc surface has an associated disc head slider 116 which is mounted to disc drive 100 for communication with the disc surface. In the example shown in FIG. 1, sliders 116 are supported by suspensions 118 which are in turn attached to track accessing arms 120 of an actuator 122. The actuator 122 shown in FIG. 2 is of the type known as a rotary moving coil a...
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Abstract
A base assembly for use in an airtight enclosure. The base assembly includes a metal stamped section and an overmold section formed adjacent to the metal stamped section. The overmold section includes at least one stress relief feature for eliminating distortion stresses exerted on the metal stamped section by the overmold section.
Description
CROSS-REFERENCE TO RELATED APPLICATION [0001] The present application is a continuation-in-part of and claims priority of U.S. patent application Ser. No. 11 / 064,175, filed Feb. 23, 2005, the content of which is hereby incorporated by reference in its entirety.FIELD OF THE INVENTION [0002] The present invention relates generally to data storage systems. In particular, the present invention relates to a base for a data storage system. BACKGROUND OF THE INVENTION [0003] Disc drives are typical data storage systems and are commonly used in work stations, personal computers, portable computers and other computing systems to store large amounts of data in a form that can be readily available to a user. A disc drive includes a rigid housing having a base and a cover that encloses a variety of components. The components include one or more discs having data surfaces that are coated with a magnetizable medium for storage of digital information in a plurality of circular, concentric data tra...
Claims
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IPC IPC(8): G11B33/14
CPCG11B25/043
Inventor XU, MOHONG, YIRENLIM, POHLYEJIERAPIPATANAKUL, NIROOT
Owner SEAGATE TECH LLC